Adjusting repeater gain based on antenna feedback path loss

A repeater, comprising:

• a first port;
• a second port;
• a transmitter communicatively coupled to the first port;
• a receiver communicatively coupled to the second port;
• and
• a controller configured to:
• detect an oscillation in the repeater;
• identify a first power level of a signal transmitted from the transmitter, wherein the signal is a licensed or unlicensed radio frequency (RF) signal;
• identify a second power level of the signal received at the receiver;
• determine, after the oscillation occurs in the repeater, an antenna feedback path loss of the repeater based on the first power level and the second power level, wherein the antenna feedback path loss is associated with the oscillation;
• and
• set a maximum gain level for the repeater based in part on the antenna feedback path loss to avoid a subsequent oscillation in the repeater;
• wherein the controller is configured to:
• disable one or more radio frequency (RF) signal paths of the repeater before a maximum gain level is set;
• and
• enable the one or more RF signal paths after the maximum gain level is set.

A repeater operable to detect antenna feedback path loss, the repeater comprising:

• a first port;
• a second port;
• a transmitter communicatively coupled to the first port, the transmitter configured to transmit a path loss signal;
• a receiver communicatively coupled to the second port, the receiver configured to receive the path loss signal transmitted by the transmitter;
• a first-direction two-antenna radio frequency (RF) feedback cancellation circuit configured to be coupled between a first antenna configured to be coupled to the first antenna port and a second antenna configured to be coupled to the second antenna port to reduce feedback between the first antenna and the second antenna for a selected band in a first direction to increase the antenna feedback path loss of the repeater;
• and
• a controller configured to:
• identify a first power level of the signal transmitted from the transmitter;
• identify a second power level of the signal received at the receiver;
• determine an antenna feedback path loss of the repeater based on the first power level and the second power level;
• and
• set a maximum gain level for the repeater based in part on the antenna feedback path loss to avoid an oscillation in the repeater.

A repeater operable to detect antenna feedback path loss, the repeater comprising:

• a first port;
• a second port;
• a transmitter communicatively coupled to the first port, the transmitter configured to transmit a path loss signal;
• a receiver communicatively coupled to the second port, the receiver configured to receive the path loss signal transmitted by the transmitter;
• and
• a first direction signal path coupled between the first port and the second port;
• a second direction signal path coupled between the first port and the second port;
• a controller configured to:
• identify a first power level of the signal transmitted from the transmitter;
• identify a second power level of the signal received at the receiver;
• determine an antenna feedback path loss of the repeater based on the first power level and the second power level;
• and
• set a maximum gain level for the repeater to be below a repeater oscillation level by a defined oscillation margin based in part on the antenna feedback path loss to avoid an oscillation in the repeater;
• wherein the controller is configured to set one or more of the following to set a system gain of the repeater:
• a low noise amplifier gain level on the first direction path;
• a power amplifier gain level on the first direction path;
• a variable attenuator attenuation level on the first direction path;
• a low noise amplifier gain level on the second direction path;
• a power amplifier gain level on the second direction path;
• or
• a variable attenuator attenuation level on the second direction path.

A repeater operable to detect antenna feedback path loss, the repeater comprising:

• a first port;
• a second port;
• a transmitter communicatively coupled to the first port, the transmitter configured to transmit a path loss signal;
• a receiver communicatively coupled to the second port, the receiver configured to receive the path loss signal transmitted by the transmitter;
• and
• a controller configured to:
• identify a first power level of the signal transmitted from the transmitter;
• identify a second power level of the signal received at the receiver;
• determine an antenna feedback path loss of the repeater based on the first power level and the second power level;
• and
• set a maximum gain level for the repeater to be below a repeater oscillation level by a defined oscillation margin based in part on the antenna feedback path loss to avoid an oscillation in the repeater;
• wherein the controller is configured to set one or more of the following to set a system gain of the repeater:
• an electrically adjustable gain level of a first antenna configured to be coupled to the first port;
• or
• an electrically adjustable gain level of a second antenna configured to be coupled to the second port.

A repeater operable to detect antenna feedback path loss, the repeater comprising:

• a first port;
• a second port;
• a transmitter communicatively coupled to the first port, the transmitter configured to transmit a path loss signal;
• a receiver communicatively coupled to the second port, the receiver configured to a controller configured to:
• identify a first power level of the signal transmitted from the transmitter;
• identify a second power level of the signal received at the receiver;
• receive the path loss signal transmitted by the transmitter;
• and
• determine an antenna feedback path loss of the repeater based on the first power level and the second power level;
• and
• set a maximum gain level for the repeater to be below a repeater oscillation level by a defined oscillation margin based in part on the antenna feedback path loss to avoid an oscillation in the repeater
• wherein the controller is configured to set the maximum gain level for the repeater in accordance with a defined pattern of antenna feedback path losses for the repeater.